feat: Add remote management, fetch, and push subcommands

- Implement remote add/remove/rename/set-url/show operations
- Add fetch and push subcommands for remote synchronization
- Create remote_wrapper class for RAII management
- Add comprehensive test suite (19 tests, all passing)
- Fix CMakeLists.txt to find CLI11 in conda/pixi environment

Signed-off-by: Julien Jerphanion <git@jjerphan.xyz>

Author: jjerphan

CMakeLists.txt

@@ -50,12 +50,18 @@ set(GIT2CPP_SRC
     ${GIT2CPP_SOURCE_DIR}/subcommand/clone_subcommand.hpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/commit_subcommand.cpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/commit_subcommand.hpp
+    ${GIT2CPP_SOURCE_DIR}/subcommand/fetch_subcommand.cpp
+    ${GIT2CPP_SOURCE_DIR}/subcommand/fetch_subcommand.hpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/init_subcommand.cpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/init_subcommand.hpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/log_subcommand.cpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/log_subcommand.hpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/merge_subcommand.cpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/merge_subcommand.hpp
+    ${GIT2CPP_SOURCE_DIR}/subcommand/push_subcommand.cpp
+    ${GIT2CPP_SOURCE_DIR}/subcommand/push_subcommand.hpp
+    ${GIT2CPP_SOURCE_DIR}/subcommand/remote_subcommand.cpp
+    ${GIT2CPP_SOURCE_DIR}/subcommand/remote_subcommand.hpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/reset_subcommand.cpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/reset_subcommand.hpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/status_subcommand.cpp
@@ -82,6 +88,8 @@ set(GIT2CPP_SRC
     ${GIT2CPP_SOURCE_DIR}/wrapper/object_wrapper.hpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/refs_wrapper.cpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/refs_wrapper.hpp
+    ${GIT2CPP_SOURCE_DIR}/wrapper/remote_wrapper.cpp
+    ${GIT2CPP_SOURCE_DIR}/wrapper/remote_wrapper.hpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/repository_wrapper.cpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/repository_wrapper.hpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/signature_wrapper.cpp

src/main.cpp

@@ -10,9 +10,12 @@
 #include "subcommand/checkout_subcommand.hpp"
 #include "subcommand/clone_subcommand.hpp"
 #include "subcommand/commit_subcommand.hpp"
+#include "subcommand/fetch_subcommand.hpp"
 #include "subcommand/init_subcommand.hpp"
 #include "subcommand/log_subcommand.hpp"
 #include "subcommand/merge_subcommand.hpp"
+#include "subcommand/push_subcommand.hpp"
+#include "subcommand/remote_subcommand.hpp"
 #include "subcommand/reset_subcommand.hpp"
 #include "subcommand/status_subcommand.hpp"
 
@@ -35,9 +38,12 @@ int main(int argc, char** argv)
         checkout_subcommand checkout(lg2_obj, app);
         clone_subcommand clone(lg2_obj, app);
         commit_subcommand commit(lg2_obj, app);
+        fetch_subcommand fetch(lg2_obj, app);
         reset_subcommand reset(lg2_obj, app);
         log_subcommand log(lg2_obj, app);
         merge_subcommand merge(lg2_obj, app);
+        push_subcommand push(lg2_obj, app);
+        remote_subcommand remote(lg2_obj, app);
 
         app.require_subcommand(/* min */ 0, /* max */ 1);
 

src/subcommand/fetch_subcommand.cpp

@@ -0,0 +1,121 @@
+#include <iostream>
+#include <iomanip>
+
+#include <git2/remote.h>
+
+#include "../subcommand/fetch_subcommand.hpp"
+#include "../wrapper/repository_wrapper.hpp"
+#include "../wrapper/remote_wrapper.hpp"
+#include "../utils/output.hpp"
+#include "../utils/git_exception.hpp"
+
+namespace
+{
+    int sideband_progress(const char* str, int len, void*)
+    {
+        printf("remote: %.*s", len, str);
+        fflush(stdout);
+        return 0;
+    }
+
+    int fetch_progress(const git_indexer_progress* stats, void* payload)
+    {
+        static bool done = false;
+
+        auto* pr = reinterpret_cast<git_indexer_progress*>(payload);
+        *pr = *stats;
+
+        if (done)
+        {
+            return 0;
+        }
+        
+        int network_percent = pr->total_objects > 0 ?
+            (100 * pr->received_objects / pr->total_objects)
+            : 0;
+        size_t mbytes = pr->received_bytes / (1024*1024);
+
+        std::cout << "Receiving objects: " << std::setw(4) << network_percent
+            << "% (" << pr->received_objects << "/" << pr->total_objects << "), "
+            << mbytes << " MiB";
+
+        if (pr->received_objects == pr->total_objects)
+        {
+            std::cout << ", done." << std::endl;
+            done = true;
+        }
+        else
+        {
+            std::cout << '\r';
+        }
+        return 0;
+    }
+
+    int update_refs(const char* refname, const git_oid* a, const git_oid* b, git_refspec*, void*)
+    {
+        char a_str[GIT_OID_SHA1_HEXSIZE+1], b_str[GIT_OID_SHA1_HEXSIZE+1];
+        
+        git_oid_fmt(b_str, b);
+        b_str[GIT_OID_SHA1_HEXSIZE] = '\0';
+
+        if (git_oid_is_zero(a))
+        {
+            printf("[new]     %.20s %s\n", b_str, refname);
+        }
+        else
+        {
+            git_oid_fmt(a_str, a);
+            a_str[GIT_OID_SHA1_HEXSIZE] = '\0';
+            printf("[updated] %.10s..%.10s %s\n", a_str, b_str, refname);
+        }
+
+        return 0;
+    }
+}
+
+fetch_subcommand::fetch_subcommand(const libgit2_object&, CLI::App& app)
+{
+    auto* sub = app.add_subcommand("fetch", "Download objects and refs from another repository");
+
+    sub->add_option("<remote>", m_remote_name, "The remote to fetch from")
+        ->default_val("origin");
+
+    sub->callback([this]() { this->run(); });
+}
+
+void fetch_subcommand::run()
+{
+    auto directory = get_current_git_path();
+    auto repo = repository_wrapper::open(directory);
+
+    // Find the remote (default to origin if not specified)
+    std::string remote_name = m_remote_name.empty() ? "origin" : m_remote_name;
+    auto remote = repo.find_remote(remote_name);
+
+    git_indexer_progress pd = {0};
+    git_fetch_options fetch_opts = GIT_FETCH_OPTIONS_INIT;
+    fetch_opts.callbacks.sideband_progress = sideband_progress;
+    fetch_opts.callbacks.transfer_progress = fetch_progress;
+    fetch_opts.callbacks.payload = &pd;
+    fetch_opts.callbacks.update_refs = update_refs;
+
+    cursor_hider ch;
+    
+    // Perform the fetch
+    throw_if_error(git_remote_fetch(remote, nullptr, &fetch_opts, "fetch"));
+
+    // Show statistics
+    const git_indexer_progress* stats = git_remote_stats(remote);
+    if (stats->local_objects > 0)
+    {
+        std::cout << "\rReceived " << stats->indexed_objects << "/" << stats->total_objects
+            << " objects in " << stats->received_bytes << " bytes (used " 
+            << stats->local_objects << " local objects)" << std::endl;
+    }
+    else
+    {
+        std::cout << "\rReceived " << stats->indexed_objects << "/" << stats->total_objects
+            << " objects in " << stats->received_bytes << " bytes" << std::endl;
+    }
+}
+

src/subcommand/fetch_subcommand.hpp

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <string>
+
+#include <CLI/CLI.hpp>
+
+#include "../utils/common.hpp"
+#include "../wrapper/repository_wrapper.hpp"
+
+class fetch_subcommand
+{
+public:
+
+    explicit fetch_subcommand(const libgit2_object&, CLI::App& app);
+    void run();
+
+private:
+
+    std::string m_remote_name;
+};
+
+
+

src/subcommand/push_subcommand.cpp

@@ -0,0 +1,68 @@
+#include <iostream>
+
+#include <git2/remote.h>
+
+#include "../subcommand/push_subcommand.hpp"
+#include "../wrapper/repository_wrapper.hpp"
+#include "../wrapper/remote_wrapper.hpp"
+#include "../utils/git_exception.hpp"
+#include "../utils/common.hpp"
+
+namespace
+{
+    int push_transfer_progress(unsigned int current, unsigned int total, size_t bytes, void*)
+    {
+        if (total > 0)
+        {
+            int percent = (100 * current) / total;
+            std::cout << "Writing objects: " << percent << "% (" << current 
+                << "/" << total << "), " << bytes << " bytes\r";
+        }
+        return 0;
+    }
+
+    int push_update_reference(const char* refname, const char* status, void*)
+    {
+        if (status)
+        {
+            std::cout << "  " << refname << " " << status << std::endl;
+        }
+        else
+        {
+            std::cout << "  " << refname << std::endl;
+        }
+        return 0;
+    }
+}
+
+push_subcommand::push_subcommand(const libgit2_object&, CLI::App& app)
+{
+    auto* sub = app.add_subcommand("push", "Update remote refs along with associated objects");
+
+    sub->add_option("<remote>", m_remote_name, "The remote to push to")
+        ->default_val("origin");
+    
+    sub->add_option("<refspec>", m_refspecs, "The refspec(s) to push");
+
+    sub->callback([this]() { this->run(); });
+}
+
+void push_subcommand::run()
+{
+    auto directory = get_current_git_path();
+    auto repo = repository_wrapper::open(directory);
+
+    std::string remote_name = m_remote_name.empty() ? "origin" : m_remote_name;
+    auto remote = repo.find_remote(remote_name);
+
+    git_push_options push_opts = GIT_PUSH_OPTIONS_INIT;
+    push_opts.callbacks.push_transfer_progress = push_transfer_progress;
+    push_opts.callbacks.push_update_reference = push_update_reference;
+
+    git_strarray_wrapper refspecs_wrapper(m_refspecs);
+    git_strarray* refspecs_ptr = m_refspecs.empty() ? nullptr : refspecs_wrapper;
+
+    throw_if_error(git_remote_push(remote, refspecs_ptr, &push_opts));
+    std::cout << "Pushed to " << remote_name << std::endl;
+}
+

src/subcommand/push_subcommand.hpp

@@ -0,0 +1,25 @@
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include <CLI/CLI.hpp>
+
+#include "../utils/common.hpp"
+#include "../wrapper/repository_wrapper.hpp"
+
+class push_subcommand
+{
+public:
+
+    explicit push_subcommand(const libgit2_object&, CLI::App& app);
+    void run();
+
+private:
+
+    std::string m_remote_name;
+    std::vector<std::string> m_refspecs;
+};
+
+
+